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NitrosovibrioRANK: GenusTAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Betaproteobacteria -> Nitrosomonadales -> Nitrosomonadaceae -> Nitrosovibrio OVERVIEW: Slender, curved rods (Figure 1a), 0.3–0.4 × 1.1–3.0 µm. Spherical forms, 1.0–1.2 µm in diameter, may occur in cultures. Gram-negative cell wall. Intracytoplasmic membranes are rare (Figure 1b), but when present, appear as tubular invaginations. Motile cells possess 1–4 subpolar to lateral flagella (Figure 2), about 18 nm wide and 4.2–7.5 µm long. Carboxysomes observed in one strain. Most, but not all, strains are urease positive. Commonly distributed in oligotrophic soils, such as grasslands, heath, and forest soils, as well as in mountainous environments. Some isolates originate from acid tea soils and from building stones. The mol% G + C of the DNA is: 53.9. Type species: Nitrosovibrio tenuis |